diff --git a/components/script/dom/webglprogram.rs b/components/script/dom/webglprogram.rs
index d288e9422c4f..0458e2ae2ca8 100644
--- a/components/script/dom/webglprogram.rs
+++ b/components/script/dom/webglprogram.rs
@@ -147,7 +147,7 @@ impl WebGLProgram {
         }
 
         // Check if the name is reserved
-        if name.starts_with("webgl") || name.starts_with("_webgl_") {
+        if name.starts_with("gl_") || name.starts_with("webgl") || name.starts_with("_webgl_") {
             return Err(WebGLError::InvalidOperation);
         }
 
@@ -185,6 +185,10 @@ impl WebGLProgram {
         }
 
         // Check if the name is reserved
+        if name.starts_with("gl_") {
+            return Err(WebGLError::InvalidOperation);
+        }
+
         if name.starts_with("webgl") || name.starts_with("_webgl_") {
             return Ok(None);
         }
diff --git a/components/script/dom/webglrenderingcontext.rs b/components/script/dom/webglrenderingcontext.rs
index 197dcce55f51..5f1b0589af4c 100644
--- a/components/script/dom/webglrenderingcontext.rs
+++ b/components/script/dom/webglrenderingcontext.rs
@@ -979,12 +979,10 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
     fn GetUniformLocation(&self,
                           program: Option<&WebGLProgram>,
                           name: DOMString) -> Option<Root<WebGLUniformLocation>> {
-        if let Some(program) = program {
-            handle_potential_webgl_error!(self, program.get_uniform_location(name), None)
-                .map(|location| WebGLUniformLocation::new(self.global().r(), location, program.id()))
-        } else {
-            None
-        }
+        program.and_then(|p| {
+            handle_potential_webgl_error!(self, p.get_uniform_location(name), None)
+                .map(|location| WebGLUniformLocation::new(self.global().r(), location, p.id()))
+        })
     }
 
     // https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.3
diff --git a/tests/wpt/metadata/webgl/conformance-1.0.3/conformance/programs/gl-bind-attrib-location-test.html.ini b/tests/wpt/metadata/webgl/conformance-1.0.3/conformance/programs/gl-bind-attrib-location-test.html.ini
index c81f7bef1543..17d8dfb7a4bb 100644
--- a/tests/wpt/metadata/webgl/conformance-1.0.3/conformance/programs/gl-bind-attrib-location-test.html.ini
+++ b/tests/wpt/metadata/webgl/conformance-1.0.3/conformance/programs/gl-bind-attrib-location-test.html.ini
@@ -1,3 +1,4 @@
 [gl-bind-attrib-location-test.html]
   type: testharness
-  expected: CRASH
+  [WebGL test #6: successfullyParsed should be true (of type boolean). Was undefined (of type undefined).]
+    expected: FAIL